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Chapter 2 Study Guide. Energy enters the ecosystem from the sunlight where organisms known as producers convert it into food. Energy Roles Producers : Take in carbon from the air and through photosynthesis make sugar for its food and release oxygen into the air.

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Presentation Transcript
slide1

Chapter 2 Study Guide

Energy enters the ecosystem from the sunlight where organisms known as producers convert it into food.

  • Energy Roles
  • Producers:
  • Take in carbon from the air and through photosynthesis make sugar for its food and release oxygen into the air.
  • Use the sun’s energy to make their own food through photosynthesis
  • Are the source of all food in an ecosystem
  • Consumers: Consumers are organisms that obtain energy by eating another organism.
  • There are 3 main types -
  • 1. Herbivore: eats only plants
  • 2. Carnivore: eats only animals
      • Scavenger: eats the bodies of dead animals
  • 3. Omnivore: eats both plants and animals
  • Decomposers: breaks down living and dead organisms
  • ex: mushroom, bacteria, and mold
slide2

Energy Pyramid

3rd level consumer

carnivores

ex: hawk

2nd level consumer

Carnivores or omnivores

Ex: snake

10% of the energy transfers to the 3rd level consumer

10% of the energy transfers to the 2nd level consumer

1st level consumer

Herbivores

Ex: mouse

10% of the energy transfers to the 1st level consumer

Producer

Always starts the food web

Ex: plants

The amount of energy available decreases as you move up the pyramid. This means there are fewer animals at the top of the pyramid.

slide3

A FOOD CHAIN is a series of events in which one organism eats another to obtain energy.

  • A FOOD WEB consists of many overlapping food chains.
water cycle
Water Cycle

.

Condensation: Gas cools and turns back into liquid.

hail

rain

Precipitation: droplets get heavy and drop to the earth as rain, snow, sleet or hail.

sleet

snow

Evaporation: water molecules absorb heat from the sun and change to a gas.

lake

slide5

Matter in an ecosystem is recycled because the supply is limited while need for it is not.

Producers take in carbon from the air and make C6H12O6 (sugar) for their own food through photosynthesis

Producers release oxygen into the air through photosynthesis.

Sun

6CO2

Carbon dioxide

6O2

oxygen

6H2O

water

Biome

photosynthesis

C6H12o6

slide6

Nitrogen Cycle:

  • Free nitrogen is in the air
  • Plants fix the nitrogen through root nodules which are bumps on the roots that store the fixed nitrogen.
  • Consumers eat the plants
  • Consumers dies
  • Decomposers release the nitrogen back into the air as free nitrogen.

Biomes

A biome is a group of ecosystems with similar climates and organisms.

A Biome is determined by climate (temperature and amount of precipitation) because it limits the distribution of plant life.

Climate: the typical weather pattern

There are 6 major types of land biomes

  • Desert
  • Rainforest
    • -Temperate
    • -Tropical

3. Grassland

4. Deciduous

5. Boreal forest

6. Tundra/mountain and ice